THIS! Forget the dryer sheets, and just make a habit of reaching back to touch the bulkhead door before sliding out of your seat. The static electricity builds up when your uniform slides across the seat, and the shock comes from that electricity discharging as you touch the metal door. If you touch the door while sliding off your seat, the static flows through you and into the door without the shock. It's become a habit for me to do this during the winter months.